I'm not surprised by this. I'd have been shocked if it wasn't constitutional. I know some appreciate the legal discussion, and the precedent set, but to me this was a waste of time and tax payers money. Provinces spent years, and piles of tax dollars, fighting this instead of just putting in a carbon pricing plan.

Politically, this has huge implications. Big win for Trudeau of course, though I don't think it's going to move votes at all. Win or lose, the public made up its mind years ago on the carbon tax. I imagine the CPC will still run on removing it. That's the only part of their climate policy they've released so they're stuck with it now. But this will mean they can't call it unconstitutional. Makes it a bit harder for them.